KM 784 then BA 679 at Istanbul
Valletta → Istanbul → London Heathrow
Timetable, Istanbul time
21:45KM 784 from Valletta at the gate
18:35BA 679 to London Heathrow leaves the gate
20 h 50 apart on the timetable, overnight
BA 679 leaves 20 h 50 after KM 784 arrives on the timetable: more than half a day, so not a connection we count.